Psychology
Some patients go blind and insist they can still see
Anton–Babinski syndrome strikes people who've lost their sight to damage in the brain's visual cortex, not the eyes. Told they're blind, patients confidently deny it and confabulate descriptions of a room they can't actually see, blaming any collisions on clumsiness or bad lighting. It's an extreme case of anosognosia — a brain that can't perceive its own deficit.